"Stone Slab" Steps
These are the entrance steps of our
They are meant look as if made of two large stone slabs.
Materials used for this project: Plywood, Airdrying Clay, Acrylic colors
(White, Paynes Grey, Burnt Sienna, Raw Umber, some Green)
In order to get the look and feel of stone,
a sort of real clay which can be burnt or airdryed was used to cover the steps with.
Color doesn't matter at this stage.
To make the steps look like large flat fieldstones, slightly press in your fingertip here and there. You should get clear elevations and roundish depressions. Don't make them too regular.(See picture above, right.) If you want your stones to look as if they have been hewed roughly, use a sculpting tool or the back of your fingernail and make short scrapes all over the surface. The effect can be seen in the picture below (I hope). If you want your stones to look as if they have been hewed and sanded, forget everything I have said about irregularity and smooth out the clay as even as you can.
In any case, as a final step take a soft toothbrush or stiff paintbrush and very very gently press it into the clay. Do that all over the clay surface. Don't do too much, as you might destroy the basic texture.
Click to enlarge
Can you see the wonderful cracks? They look very natural.
You can of course also add some manmade cracks with some sharp tool or cover them with some fresh clay where you don't want them.
Fill gaps or cracks where the clay might come loose with a little white glue, wood glue or ceramic glue. But don't worry too much - the coat of acrylic colors will add stability, too.
I used acrylic artist colors, miscelleanous brands.
Now mix one of the other colors into that gray to get some variation. You might also want to lighten it up with a little white.